6.2 Testing the ignition safety shutoff
To test the ignition system safety shutoff device:
1. With the boiler in operation, shut off the gas control valve directly outside the boiler case.
2.
Ensure that the boiler has purged, attempted to re-light three times, has shut off and the
appropriate error information is displayed on the controller.
3. The error is displayed after testing the ignition safety shutoff.
4. To restart the boiler, reset the power or on the touchscreen
controller's Main Menu, tap Diagnostics>Advanced
Diagnostics>Clear Errors>Yes>OK.
6.3 Commissioning
The EX modulating boilers are factory calibrated to operate with
natural gas (or propane if desired) at sea level. The gas-air ratio or
zero-offset adjustment screw may need adjusting to attain optimum
combustion results. Note that only qualified technicians using
properly functioning and calibrated combustion analyzing equipment
should perform a mixture adjustment.
6.3.1 Checking a boiler's fuel source
This boiler model can burn either natural gas or propane if equipped with the correct fuel-air
metering device. Examine the rating plate of the boiler to ensure it is configured for the fuel you
are using. If the boiler is configured for natural gas, but needs to be converted to propane, use the
conversion kit (sold separately by IBC) to install the appropriate fitting(s) and adjust the gas
valve accordingly. See Table 10 for the required conversion kit.
The touchscreen controller will automatically detect the installation’s altitude and make the
appropriate adjustments to operate the boiler up to 4,500 feet in elevation without de-ration. The
boiler will automatically de-rate at altitudes above 4,500 feet.
Section: Boiler operation
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